CN216744333U - Air single heat accumulation burner for burning natural gas through multi-pipe spray gun - Google Patents
Air single heat accumulation burner for burning natural gas through multi-pipe spray gun Download PDFInfo
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- CN216744333U CN216744333U CN202123318854.9U CN202123318854U CN216744333U CN 216744333 U CN216744333 U CN 216744333U CN 202123318854 U CN202123318854 U CN 202123318854U CN 216744333 U CN216744333 U CN 216744333U
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Abstract
The utility model relates to the technical field of steel rolling heating furnaces, in particular to an air single heat accumulation burner for burning natural gas by a multi-pipe spray gun, which comprises a combined box body, wherein an air heat accumulation box extending into the combined box body is embedded along one end of the combined box body, the front end of the air heat accumulation box is provided with at least one air channel penetrating through the combined box body, and one side of the combined box body is used as an air nozzle; the rear end of the air heat storage box is provided with an air connecting pipe used for being connected with an external air source; at least one gas channel which can penetrate through the combined box body is arranged below the air heat storage box, one side of the combined box body is used as a gas nozzle, and the other end of the gas channel is connected with a natural gas connecting pipe; the gas channel may form an included angle with an external extension line of the air channel. The device can solve the problems that the natural gas spray gun is easy to burn out, the cooling air is used for cooling, the content of NOx in the discharged flue gas is too high and the like, and achieves the purposes of further saving energy, reducing emission and being safe to use.
Description
Technical Field
The utility model relates to the technical field of steel rolling heating furnaces, in particular to an air single heat accumulation burner for burning natural gas by a multi-pipe spray gun.
Background
Natural gas as a fuel of a steel rolling heating furnace is a high-quality fuel with high heat value, the price is relatively expensive, two combustion technologies are generally adopted at present, one is a simple and reliable air/flue gas heat exchange type combustion technology which is generally applied in the past, and the main defects are that the recovery of flue gas waste heat is insufficient and the energy consumption is relatively high; the other is a new energy-saving technology which is widely popularized and used in recent years, namely an air single heat accumulation combustion technology.
At present, a lot of steel rolling heating furnaces which adopt an air single heat accumulation technology to burn natural gas for production are available in China, but the steel rolling heating furnaces are more successful or have more ideal application effects, especially for steel rolling heating furnaces with narrow hearth widths (such as less than 3m), at the moment, if the design of the selected air single heat accumulation burner is not reasonable, waste is easily caused due to insufficient combustion of natural gas, and a chimney can seriously generate a black smoke phenomenon, as shown in figures 1 and 2, the burner is a common air single heat accumulation burner, and is characterized in that a natural gas spray gun is arranged in the center of a burner and is wrapped and combusted by a circle of high-temperature air nozzles, so that flame can be effectively organized, the natural gas combustion is sufficient, and the burner is very suitable for the steel rolling heating furnaces with narrow furnace widths. However, the two parts of the cooling air of the spray gun and the natural gas spray gun head are obviously insufficient:
(1) continuous and large amount of cooling air (dozens of burners are required to be installed on one heating furnace) is sprayed into the heating furnace, so that the natural gas consumption is increased;
(2) the natural gas spray gun head is in a severe environment with high temperature and high oxidation for a long time, is easy to damage and generally needs to be replaced once a year. In addition, large amounts of NOx may be generated due to the local high temperatures created by the burner flames being too concentrated.
Therefore, it is very important to develop a new air single regenerative burner with reliable technology and more energy saving.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the problems in the prior art and provides an air single heat accumulation burner for burning natural gas by a multi-pipe spray gun, wherein a natural gas nozzle and an air nozzle are arranged separately from each other from top to bottom, the traditional central cooling air (as shown in figure 2) is cancelled, and the problem of over-concentrated flame can be reduced by reasonably designing the nozzle angle and the nozzle speed by adopting a natural gas multi-pipe nozzle (a multi-strand trickle principle), and the problems that the natural gas spray gun is easy to burn out, the cooling air is cooled, the content of NOx in the discharged flue gas is too high and the like can be solved, so that the aims of further saving energy, reducing emission and being safely used are fulfilled.
The above purpose is realized by the following technical scheme:
an air single heat accumulation burner for burning natural gas by a multi-pipe spray gun comprises a combined box body, wherein an air heat accumulation box extending into the combined box body is embedded along one end of the combined box body, at least one air channel penetrating through the combined box body is arranged at the front end of the air heat accumulation box, and one side of the combined box body is used as an air nozzle; the rear end of the air heat storage box is provided with an air connecting pipe used for being connected with an external air source; at least one gas channel which can penetrate through the combined box body is arranged below the air heat storage box, one side of the combined box body is used as a gas nozzle, and the other end of the gas channel is connected with a natural gas connecting pipe; the gas channel may form an included angle with an external extension line of the air channel.
Furthermore, the included angle between the external extension line of the gas channel and the external extension line of the air channel is 10-60 degrees.
Furthermore, a box body transition section is further arranged between the air channel and the air heat storage box, and the top of the box body transition section is provided with a downward slope.
Further, the gradient is 10 to 60 °.
Further, the number of the air channels is two, the number of the gas channels is four, and every two gas channels are matched with one air channel.
Further, the natural gas connecting pipe is positioned below the combined box body.
Advantageous effects
The air single heat accumulation burner for burning natural gas by the multi-pipe spray gun provided by the utility model has the following advantages:
1. the natural gas multi-pipe spray gun and the air nozzle are arranged in a close distance from top to bottom
Because the furnace width of some steel rolling heating furnaces is narrow, the natural gas multi-pipe spray gun and the air nozzle are arranged in a close distance from top to bottom, so that a plurality of strands of trickle natural gas and high-temperature air can be mixed while walking in a short distance of the narrow furnace width, and the basic requirement of full combustion of the natural gas can be met;
2. the natural gas spray gun cancels cooling of cooling air, thereby achieving the further energy-saving effect
The nozzle part of the natural gas multi-pipe spray gun, which is contacted with flame or high-temperature furnace gas, is made of refractory materials, and the aperture of the multi-pipe spray gun is small, so that the spray gun is not cooled by cooling air, and high-temperature deformation or burning can not occur.
3. Effectively reduce the NOx content in the smoke emission
The natural gas spouts are distributed by adopting a plurality of pipes, which is equivalent to the relative increase of the flame quantity of the whole heating furnace, at the moment, the flame is small and dispersed, the defect that the flame of a central single-pipe spray gun is large and concentrated is avoided, and the natural gas spouts and the high-temperature air spouts are arranged in a close range from top to bottom, so that the spout angle and the spout speed can be reasonably designed, and the reduction of NOx generation is more facilitated.
Drawings
FIG. 1 is a schematic structural diagram of a conventional air-only regenerative burner;
FIG. 2 is a schematic view of a nozzle of a conventional air single-regenerative combustor;
FIG. 3 is a first perspective structural view of a natural gas fired air single heat accumulation burner for a multi-tube lance according to the present invention;
FIG. 4 is a second perspective structural view of a natural gas fired air single heat accumulation burner for a multi-tube lance according to the present invention;
FIG. 5 is a first perspective operational view of a natural gas fired air single regenerative burner for a multi-tube lance according to the present invention;
FIG. 6 is a second perspective operational view of a natural gas fired air single heat storage combustor for a multi-tube lance according to the present invention. Graphic notation:
1-combined box body, 2-air heat storage box, 3-air channel, 4-air nozzle, 5-air connecting pipe, 6-gas channel, 7-gas nozzle, 8-natural gas connecting pipe and 9-box body transition section.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples.
As shown in fig. 3 and 4, an air single heat accumulation burner for burning natural gas by a multi-pipe spray gun comprises a combined box body 1, an air heat accumulation box 2 extending into the combined box body is embedded along one end of the combined box body 1, the front end of the air heat accumulation box 2 is provided with at least one air channel 3 penetrating through the combined box body 1, and one side of the combined box body 1 is used as an air nozzle 4; the rear end of the air heat storage box 2 is provided with an air connecting pipe 5 for connecting with an external air source;
at least one gas channel 6 which can penetrate through the combined box body 1 is arranged below the air heat storage box 2, one side of the combined box body 1 is used as a gas nozzle 7, and the other end of the gas channel 6 is connected with a natural gas connecting pipe 8;
the air nozzle 4 and the book searching gas nozzle 7 are positioned on the same side of the combined box body 1;
and the gas channel 6 and the external extension line of the air channel 3 can form an included angle.
The natural gas connecting pipe 8 is positioned below the combined box body 1.
The working principle is as follows:
as shown in fig. 5 and 6, when the high-temperature air generated by the heat storage technology is injected into the furnace from the air nozzle 4 at a high speed (at this time, the real-state speed can reach 60-70 m/s), the surrounding furnace gas is pumped in the furnace, so that the concentrations of oxygen and nitrogen in the combustion-supporting air are reduced, the ambient furnace gas and the natural gas injected from the gas nozzle 7 are mixed and combusted at a high speed while moving in the furnace, and the three basic conditions (or related formulas) are satisfied in the basic conditions (or related formulas) for generating NOx during fuel combustion, so that the generation of NOx can be effectively reduced:
(1) reducing the maximum temperature of the flame area;
(2) reducing the concentration of oxygen and nitrogen;
(3) the residence time of the flue gas in a high-temperature area is shortened.
By adopting the technical measures, the burner technology can be applied to a steel rolling heating furnace with a narrow furnace width, the flame is easy to organize, the service life is long, and the most remarkable advantages are that the aims of further saving energy, reducing consumption and reducing fuel cost can be realized.
In addition, compared with the currently commonly used natural gas-fired air single-heat-accumulation combustor, the NOx content in the smoke emission can be effectively reduced.
As an optimization of the present embodiment, an included angle between the gas channel 6 and an external extension line of the air channel 3 is 10 ° to 60 °.
A box body transition section 9 is further arranged between the air channel 3 and the air heat storage box 2, and the top of the box body transition section 9 is provided with a downward slope which can be used for increasing the air flow rate transmitted to the air channel 3. The slope may be set to 10 ° to 60 °.
As an optimization of the device, as shown in fig. 2, there are two air channels 3, four gas channels 6, and every two gas channels 6 are matched with one air channel 3.
While the utility model has been described with reference to specific preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (6)
1. The air single heat accumulation burner for burning natural gas by using the multi-pipe spray gun is characterized by comprising a combined box body, wherein an air heat accumulation box extending into the combined box body is embedded along one end of the combined box body, at least one air channel penetrating through the combined box body is arranged at the front end of the air heat accumulation box, and one side of the combined box body is used as an air nozzle; the rear end of the air heat storage box is provided with an air connecting pipe used for being connected with an external air source; at least one gas channel which can penetrate through the combined box body is arranged below the air heat storage box, one side of the combined box body is used as a gas nozzle, and the other end of the gas channel is connected with a natural gas connecting pipe; the gas channel may form an included angle with an external extension line of the air channel.
2. The air single heat accumulation burner for multi-tube spray gun burning natural gas as claimed in claim 1, wherein the angle between the gas passage and the outer extension line of the air passage is 10 ° to 60 °.
3. The multi-lance natural gas-fired air single-heat-accumulation burner as claimed in claim 1, wherein a box transition section is further provided between the air passage and the air heat accumulation box, and a top of the box transition section is provided with a downward slope.
4. The multi-lance natural gas-fired air-only regenerative burner of claim 3 in which the slope is between 10 ° and 60 °.
5. The multi-lance natural gas fired air single regenerative burner of claim 1 wherein there are two of said air passages and four of said gas passages, each two of said gas passages mating with one of said air passages.
6. The multi-lance natural gas fired air single heat accumulation burner as claimed in claim 1, wherein the natural gas connecting pipe is located below the combination tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123318854.9U CN216744333U (en) | 2021-12-27 | 2021-12-27 | Air single heat accumulation burner for burning natural gas through multi-pipe spray gun |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123318854.9U CN216744333U (en) | 2021-12-27 | 2021-12-27 | Air single heat accumulation burner for burning natural gas through multi-pipe spray gun |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216744333U true CN216744333U (en) | 2022-06-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123318854.9U Active CN216744333U (en) | 2021-12-27 | 2021-12-27 | Air single heat accumulation burner for burning natural gas through multi-pipe spray gun |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216744333U (en) |
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2021
- 2021-12-27 CN CN202123318854.9U patent/CN216744333U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Qian Xiaojun Inventor before: Xu Ligan Inventor before: Qian Xiaojun |
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| CB03 | Change of inventor or designer information |